Home / Saskatchewan / Questions / Road Signs Road Signs Report Flashing 'POLICE CHECK AHEAD': A Ignore B Stop — police checkpoint C Construction D Pedestrian Show Answer & Explanation Correct Answer: B. Stop — police checkpoint Impaired / licence / insurance. Previous Next More Road Signs Questions White diamond on blue: Red and white downward-pointing triangle: Red circle with horizontal white bar: A red octagonal sign means: Circle with diagonal X: Often Missed All Saskatchewan Questions Smart Practice Mock Exam Road Signs Guide